Knock is another word for detonation. Detonation occurs when a shock is faster than the speed of sound. A sonic boom is heard when an object travels faster than the speed of sound. Similarly a sound is produced from knock in an engine. A knock sensor is a sensitive microphone that is tuned to the specific frequency of detonation. The dme gets an input from this sensor and retards timing, closes the throttle, adds fuel, and opens the wastegates, or dome combination of the former based on the situation. Cobb says the leave all of the knock sensor response like the factory setup. They alter the running parameters to avoid knock. The procede registers the knock events via the canbus and reduces its ignition and boost aggression.

Quote:

Originally Posted by BrianMN

Quote:

Originally Posted by joshuo

Just curious, How would one go about detecting knock?
How does the DME detect it? Do all tunes rely on just the DME to predict knock?
I know some tunes are retroactive and some proactive when it comes to timing adjustments, just curious how the system goes about detecting/prediction knock.

Now that we have timing logs from the Procede as well the Accessport. What are the thoughts about what we are seeing in regards to the JB3/4's position about it not being needed?

I'm just curious since we have another reference point now (Cobb).

Alan

I don't think terry's position has ever been that timing retard isn't needed. He stated that the jb3 had "another means for influencing timing" than CPA offsetting. In any event the dme in this car is absolutely phenomenal. To be able to more tha double factory boost for thousands of miles and not blow sky high is incredible.

What we need is simply to have similarly modded cars on the same day/location. It's simple...just not that easy.

You can compare logs from cars of equal mods and HP, but at different locations and climate it's not really apples to apples.

It's also a matter of cost. There will always be users that overlook shortcomings in favor of saving money... even if it means sacrificing the longevity of their engines (mental note: never ever ever EVER buy an off lease 335). I mean seriously... JB+?!?!? REALLY?!?!

I cringe every time I see a thread like, "Just got a JB+, how high can I turn the knob?"

JB4 and Procede are extremely similar, despite the marketing. People with no technical knowledge will succumb to marketing, but the reality is that they are very similar except the CPS offsetting of the Procede which not full timing control.

JB4 and Procede are extremely similar, despite the marketing. People with no technical knowledge will succumb to marketing, but the reality is that they are very similar except the CPS offsetting of the Procede which not full timing control.

JB4 and Procede are extremely similar, despite the marketing. People with no technical knowledge will succumb to marketing, but the reality is that they are very similar except the CPS offsetting of the Procede which not full timing control.

It's also a matter of cost. There will always be users that overlook shortcomings in favor of saving money... even if it means sacrificing the longevity of their engines (mental note: never ever ever EVER buy an off lease 335). I mean seriously... JB+?!?!? REALLY?!?!

I cringe every time I see a thread like, "Just got a JB+, how high can I turn the knob?"

JB4 and Procede are extremely similar, despite the marketing. People with no technical knowledge will succumb to marketing, but the reality is that they are very similar except the CPS offsetting of the Procede which not full timing control.

Throttle closure is necessary to control overboost conditions in Cobb's flash so why would they allow something fundamentally required by their flash to work properly easily removed on their customer's request?

I already answered this question, because with ATR cobb is no longer responisble for what you choose to do with your car, you also dial in the speed of boost, so it works on your car and wont over shoot to begin with.

Clap,
Have you tried your meth with the stg 1 tune. Any differences in the timing, afr logged with the AP? I know boost is low. But it for a car with stock intake an ic in the summer, meth is a good option at 13 psi.

Clap,
Have you tried your meth with the stg 1 tune. Any differences in the timing, afr logged with the AP? I know boost is low. But it for a car with stock intake an ic in the summer, meth is a good option at 13 psi.

havnt tried it. I wont change anything though. Just like running meth on a stock car wont get you more timing, or richer af ratios.